Best Blu-ray Deals

Black Friday Week is Live, $3.99 Blu-ray Movies »
Top deals | Price drops  
 All countries United States United Kingdom Canada Germany France Spain Italy Japan
The Lord of the Rings: The Motion Picture Trilogy (Blu-ray)
$29.99
12 hrs ago
The Purge: Anarchy (Blu-ray)
$9.99
1 hr ago
Chef (Blu-ray)
$9.99
6 hrs ago
Rain Man (Blu-ray)
$3.99
 
A Million Ways to Die in the West (Blu-ray)
$9.99
13 hrs ago
Person of Interest: The Complete Third Season (Blu-ray)
$14.99
 
The Blacklist: The Complete First Season (Blu-ray)
$14.96
22 hrs ago
X-Men: Days of Future Past (Blu-ray)
$9.99
 
The Princess Bride (Blu-ray)
$3.99
8 hrs ago
Rise of the Planet of the Apes (Blu-ray)
$3.99
22 hrs ago
Lone Survivor (Blu-ray)
$7.99
 
X-Men: First Class (Blu-ray)
$3.99
 
The Avengers (Blu-ray)
$9.99
 

Go Back   Blu-ray Forum > Displays > Display Theory and Discussion > Rear Projection TVs

Reply
 
Thread Tools Display Modes
Old 08-22-2012, 01:32 PM   #1
Big Daddy Big Daddy is offline
Moderator
 
Big Daddy's Avatar
 
Jan 2008
Southern California
79
122
1
Default Replacing the DLP Chip to Solve White/Black Dots Problem on Mitsubishi DLP TV

I own a 73" Mitsubishi Model WD-73833 Diamond Series DLP TV. I purchased it in 2007. It has worked perfectly in the last five years. Its picture quality is stunning.

A few months ago, I noticed a very small white dot on the left side of the screen. It looked like a dead pixel on an LCD TV. DLP TVs are different than LCD TV. They don’t have dead pixels. They have a DLP chip with millions of tiny rotating mirrors. What appears to be a dead pixel is the result of a stuck mirror. The DLP chip is made by Texas Instruments and is used by Mitsubishi, Samsung, and Toshiba on their DLP TVs.

Anyway, the tiny white dot on the screen was not very bothersome and I ignored it. Several weeks later, I noticed the number of white dots have increased to three. To make a long story short, the number of white dots continued to increase until the TV was not even watchable. After doing some research on the internet, I realized that the DLP chip on the TV must be replaced. TV repairmen prefer to replace the entire Optical Light Engine as replacing the DLP chip is more involved and time consuming. The cost of replacing the Optical Light Engine is typically between $600 to $1,000. The entire Optical Light Engine can cost more than $500. Even when you purchase the Optical Light Engine from an online dealer, you have to pay $1,000 for a new one and when you return the old one back to them, they will refund $475. Check the following site:

http://www.tvlampsforless.com/Mitsub...60_p/75060.htm

I decided to replace the DLP chip myself. There are a few dealers on Amazon and Ebay that sell the chip. One of the best and most cost effective is ShopJimmy:

http://www.shopjimmy.com/catalogsear...lt/?q=dlp+chip
http://www.amazon.com/Samsung-Mitsub...ds=4719-001997

I ordered the chip from their Amazon store. It arrived in a few days. Unfortunately, I was too busy at the time and did not have the time needed to take the TV apart. In addition, I did not want to end up with no TV in the living room during the march of the Los Angeles Kings to the Stanley Cup. Additionally, the Olympics was a distraction, although NBC’s coverage was a national disgrace. I am tired of watching women’s behinds on taped delayed Beach Volleyball matches. While I was procrastinating and looking for excuses not to sit behind the TV and do the tedious and boring job of removing screws and disconnecting wires, the condition of the TV was becoming worse. The following picture demonstrates how awful the picture looked during the recent weeks:




Finally, after serious threats by my wife, I realized my life may be in danger or I may end up in doghouse again. I decided to get off my fanny and get to work.

The following pictures demonstrate the procedure you need to follow to replace the DLP chip.

Step 1. Remove several screws from the back panel and take it out.




Step 2. Remove additional screws and disconnect all the cables, including the DVI cable.






Step 3. Take the Optical Light Engine out and set it on a table.




Step 4. Remove a few more screws and disconnect all the cables from the top. Carefully, remove the cover from the top of the mother-board.




Step 5. Take the mother-board out by removing a few more screws that attach it to the entire unit.




Step 6. There is a screw that attaches the DLP processor to the mother-board. Loosen it and take the chip out and replace it with the new one.




Step 7. Put everything back together and keep your fingers crossed and hope for the best. In my case, everything worked perfectly and I am now allowed to leave the doghouse and sleep in the bedroom.

Note: It may be a good idea to wear plastic gloves, particularly in step 6, as electrostatic electricity can damage the chip and the circuit board.


For additional information, watch the following video:

http://www.howtorepairtv.com/

Last edited by Big Daddy; 08-25-2012 at 02:10 AM.
  Reply With Quote
Old 08-23-2012, 03:35 PM   #2
SlaughterX SlaughterX is offline
Special Member
 
SlaughterX's Avatar
 
Oct 2008
Du Quoin, IL
14
607
6
1
Default

Hmmm, I might have to look in to this. Our old 65" Mitsu did the same thing (except the dots are green).
  Reply With Quote
Old 08-24-2012, 01:50 AM   #3
robchow robchow is offline
Senior Member
 
Nov 2008
1
Default

@Big Daddy,

Thanks for this information. My Samsung DLP started with three white dots but has multiple exponentially to millions of white dots as well as blinking black dots. I thought it were dead pixel and have to purchase a new TV. I will give replacing the chip a shot as it is only a couple of hundred dollars.

The Samsung model is HLT6756 that I got from Costco. I noticed that this product supports the HLT6756W; I hope the chip works even though my model doesn't have the "W."
  Reply With Quote
Old 08-24-2012, 08:47 AM   #4
Big Daddy Big Daddy is offline
Moderator
 
Big Daddy's Avatar
 
Jan 2008
Southern California
79
122
1
Default

Quote:
Originally Posted by robchow View Post
@Big Daddy,

Thanks for this information. My Samsung DLP started with three white dots but has multiple exponentially to millions of white dots as well as blinking black dots. I thought it were dead pixel and have to purchase a new TV. I will give replacing the chip a shot as it is only a couple of hundred dollars.

The Samsung model is HLT6756 that I got from Costco. I noticed that this product supports the HLT6756W; I hope the chip works even though my model doesn't have the "W."
A few other people have experienced this problem. I should have mentioned that you also get blinking black dots. For example, when you watch a hockey game where the ice is white and the screen tends to be bright, the black dots become more noticeable.

Replacing the DLP chip is not that difficult and should not take more than an hour or so. If you remove all the screws and disconnect the wires, the parts should slide out easily. You don't need to force anything. Make sure the chip that you buy is the correct one. Also, using a portable drill instead of a screw driver is helpful as there are too many screws.

Watch the following videos:


HT Room: Panasonic PT-AE8000, Epson 1080UB Proj., Mitsubishi 65" Diamond Series HD TV, Yamaha-RX-A3010 Rec., CinePro 6-Ch. Amp. (350 W/Ch, 8 Ohm), Proton D1200 Amp., Behringer EP4000 & EPX3000 Amps., Oppo BDP-83, Sony BDP-S790, Audio Technica Tuntable, Mitsubishi S-VHS, 2 Def. Tech. Super Towers w 15" subs, 1 Def. Tech. Center & 1 Martin-Logan Center, 2 Def. Tech. Surr. & 2 PSB Surr., 2 Cadence Presence, 2 Bose 901 Rears, 2 Modified HSU 12" Subs, 1 ED DIY 12" Sub, 1 ED DIY 15" Sub, Velodyne SMS-1 Subwoofer Equalizer, DirecTV HD, Monster HTS 5000 & APC H15 Power Conditioners.
Two-Channel Room: XiangSheng Tube Preamp., Carver TFM-45 Amp. (375 W/Ch), Behringer EPX4000 Amp., Onkyo CD player, Denon Turntable, Yamaha Tuner, 2 Vintage Polk RTA-15TL Speakers, 2 LCY 100 Super Tweeters, 2 DIY Folded Horn Super Towers with 15" Sub., 1 Modified AA HD-SUB12
Family Room: Mitsubishi 73" Diamond Series TV, Yamaha DSP-A3090 Rec., DirecTV HD-DVR, PS3, Zvox Speaker, 1 DIY 12" Sub.

Last edited by Big Daddy; 08-24-2012 at 09:42 AM.
  Reply With Quote
Old 08-24-2012, 02:08 PM   #5
Remo Remo is offline
Senior Member
 
Remo's Avatar
 
Jan 2012
Michigan
12
170
24
31
Default

Nice post BD, I do believe this is worthy of the STICKY if there isn't any similar.
|| AVR - Onkyo TX-NR1009 || Amps - Emotiva XPA-2 / Emotiva IPS-1 (7 Channel) || TV - Misubishi WD60737 || BD Player - Sony BDP-S790 || CD Player - Denon DCM-290 || Gaming - Modified PS3 Fat / Modified Wii / PS4 || Main L&R - Polk Audio LSi9 || Center - PolkAudio LSiC || Surround - Polk Audio Monitor OWM3 || Subwoofer - Polk Audio PSW505 || Harmony Ultimate Remote ||
  Reply With Quote
Old 08-25-2012, 12:16 AM   #6
Big Daddy Big Daddy is offline
Moderator
 
Big Daddy's Avatar
 
Jan 2008
Southern California
79
122
1
Default

Quote:
Originally Posted by Remo View Post
Nice post BD, I do believe this is worthy of the STICKY if there isn't any similar.
You may be right as many other people may have this problem. I gave it a sticky.
HT Room: Panasonic PT-AE8000, Epson 1080UB Proj., Mitsubishi 65" Diamond Series HD TV, Yamaha-RX-A3010 Rec., CinePro 6-Ch. Amp. (350 W/Ch, 8 Ohm), Proton D1200 Amp., Behringer EP4000 & EPX3000 Amps., Oppo BDP-83, Sony BDP-S790, Audio Technica Tuntable, Mitsubishi S-VHS, 2 Def. Tech. Super Towers w 15" subs, 1 Def. Tech. Center & 1 Martin-Logan Center, 2 Def. Tech. Surr. & 2 PSB Surr., 2 Cadence Presence, 2 Bose 901 Rears, 2 Modified HSU 12" Subs, 1 ED DIY 12" Sub, 1 ED DIY 15" Sub, Velodyne SMS-1 Subwoofer Equalizer, DirecTV HD, Monster HTS 5000 & APC H15 Power Conditioners.
Two-Channel Room: XiangSheng Tube Preamp., Carver TFM-45 Amp. (375 W/Ch), Behringer EPX4000 Amp., Onkyo CD player, Denon Turntable, Yamaha Tuner, 2 Vintage Polk RTA-15TL Speakers, 2 LCY 100 Super Tweeters, 2 DIY Folded Horn Super Towers with 15" Sub., 1 Modified AA HD-SUB12
Family Room: Mitsubishi 73" Diamond Series TV, Yamaha DSP-A3090 Rec., DirecTV HD-DVR, PS3, Zvox Speaker, 1 DIY 12" Sub.
  Reply With Quote
Old 11-06-2012, 04:31 AM   #7
lkleon lkleon is offline
New Member
 
Nov 2012
Default

Good post!! I would caution against using plastic gloves to handle the
circuit board, though! The plastic can generate a static charge that can
damage the electronic circuits, and sometimes the damage is not immediately
obvious. You can purchase a static strap from Radio Shack or Newegg.com,
for a few dollars, and it is strongly recommended that you ground yourself before touching a circuit board. Conductive gloves are also available, but
they are not so easy to find.
  Reply With Quote
Old 12-11-2012, 12:45 AM   #8
robchow robchow is offline
Senior Member
 
Nov 2008
1
Default

After purchasing the DLP chip a couple of months back, I finally had time to replace the failing one. The whole process took about 5 hours (1/4 of the time was dedicated to aligning the screen as it was off center either too much on top/bottom or left/right); I highly recommend someone to help watch the TV while the adjustments are made.

I just need time to calibrate the settings and the screen would be good as before.

I had the TV for close to 6-years before the DLP chip started to fail; I have read other units failed right after warranty expired (that is, within a year or two). How long should I expect this replacement to last?
  Reply With Quote
Old 04-15-2013, 06:30 PM   #9
Mike Z Mike Z is offline
Senior Member
 
Mike Z's Avatar
 
Aug 2007
Virginia Beach
190
Default

This just started happening to me. I have a 65" Mitsubishi DLP that I purchased in 2007 and just recently I noticed little black dots on the left side of the screen. I guess I'll have to do this replacement as well.

Did you happen to notice any improvement in picture quality, besides the dots being gone, after you replaced the chip?
65" Samsung Smart HDTV
65" Mitsubishi DLP HDTV
Panasonic DMP-BD35K

Blu Wish List Star Wars OT Unaltered - Mission to Mars - The Village
  Reply With Quote
Old 07-06-2013, 04:36 PM   #10
mjmanning mjmanning is offline
New Member
 
Jul 2013
Default hello

Hi guys...I new here and stumbled across this post with these great videos after experiencing the dreaded white dot problem on my wonderful 73" mit dlp tv. I am about to begin taking apart my tv soon but I have a couple questions.

I have the complete insides to a new 73" mit DLp 3D tv. Here is why- My parents bought one just like mine since they and I love mine so much. I purchased mine about 2007, they purchased theirs this past winter. Mitsubishi sent them a replacement since the first one they received had a cracked mirror. They left the old one and didn't want it. So now with these old parts...i have a couple questions. Would the DLP chip from this newer model work with mine? I noticed upon a cursory examination that the wiring was slightly different due to changes in inputs, 3D etc...

Or...even better, could I replace all of the insides in my TV with these newer components and have it work, or could I replace the cracked mirror and screen(it got broke when my brother moved it to his house) in the new set with mine and stick all the guts back in? Are these parts compatible? Does anyone know?

Thanks guys..hope to hear from someone with answers soon!
  Reply With Quote
Old 07-23-2013, 12:13 PM   #11
Captain Kirk Captain Kirk is offline
Banned
 
Feb 2012
2
Default

I don't have the white dotting problem, but I am having a problem that the sides of peoples faces looks like a comic book shadow when light reflects off them or something that is full color will look like a blotchy gradient filter. HH Gregg has agreed (due to my warranty) to give me the entire purchase price back (and tax)...and let me keep the DLP. So I'm going today to pick out a new LED TV but if I could easily replace the DLP chip in this myself (even if it takes a few hours) I'm cool with trying it and moving the TV to my basement.

I'm looking for chips for the 73737 at the moment.

Last edited by Captain Kirk; 07-23-2013 at 12:16 PM.
  Reply With Quote
Old 07-27-2013, 08:34 PM   #12
jwcharles jwcharles is offline
New Member
 
Jul 2013
Default

When I brought me DLP TV home and hooked it up, I had a problem with the picture. All images where highlighted on one side with a green glow and on the other with a white glow. I was haveing a hard time getting an answer as to what was wrong. I happend to notice that when someone changed the chanel on the TV ( not on the cable box ) that the picture was clear and sharp. The gave me a hint for the TV is HD and the cable box was SD and the broadcast over the air is HD.

Well I called my provider and had my box changed for the HD model and the issue is a thing of the past.
  Reply With Quote
Old 09-23-2013, 10:49 AM   #13
BluPat BluPat is online now
Power Member
 
BluPat's Avatar
 
Nov 2008
Texas
537
68
2
Default

I think our 2007 Rear Projection 73" Mitsubishi is starting to produce dark spots. There are 3 that have appeared within the last few weeks. They are about this size O. I assume it's that DLP chip thing. We just replaced the lamp because it went out a few weeks ago and I don't exactly have $150+ lying around for a tiny DLP chip. We want to eventually get a Samsung LED TV.

Last edited by BluPat; 09-23-2013 at 10:51 AM.
  Reply With Quote
Reply
Go Back   Blu-ray Forum > Displays > Display Theory and Discussion > Rear Projection TVs


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:50 PM.